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(B) population with a large number of post-reproductive or older individuals and a lesser number of pre-reproductive individuals will show a negative

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Declining

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(B) population with a large number of post-reproductive or older individuals and a lesser number of pre-reproductive individuals will show a negative growth rate or declining growth.Age pyramid is a graphic representation of different age groups found in a population,with the pre-reproductive group at the base,reproductive ones in the middle,and the post-reproductive group at the top.Age pyramids are of three kinds:$(i)$ Triangular Age Pyramid: The number of pre-reproductive individuals is very large. The number of reproductive individuals is moderate and post-reproductive are fewer. The population size is growing.$(ii)$ Bell-shaped Age Pyramid: The number of pre-reproductive and reproductive individuals is almost equal. Post-reproductive individuals are comparatively fewer. The population size is stable.$(iii)$ Urn-shaped Age Pyramid: The proportion of the reproductive age group is higher than the individuals in the pre-reproductive age group. The number of post-reproductive individuals is also sizable. It is a declining population with negative growth.

When there is a large number of post-reproductive or older individuals and a lesser number of pre-reproductive individuals,then that population is:

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